Die mechanism



Dec. 16, 1930. c. FAsslNGER 1,785,116

Filed Nov. 1'7, 1928 3 Sheets-Sheet l 7 f 'x 5 @m ,1292514 Q35 v INVENTOR C. FASSINGER DIE MECHANISM Dec; "16,4930,

Filed Nov. 17, 1928 5 Sheets-Sheet 2 INVENTOR Dec. 16, 1930. c; FAsslNGER 1,785,116

DIE MECHANISM K Filed Nov. 17, 1928 A5 sheets-sheet 5 56 I lN-VEN'TOR;

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Patented Dec. 16, 1930 UNITED STATES PATENT oFFicE CHARLES FASSINGER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNORTO OLIVER IRON t STEEL CORPORATION g OF PITTSBURGLH,v PENINSYLVANIA, A CORPORATION OF PENN- SYLVANIA l ADIE MECHANISM Application mea November 17, 192s. semi No. 320,077.

` cross armscommonly used to support cables.

In bending angle 4bars' so as to make `them suitable for supporting cross arms it is dif- `ficult to prevent buckling or warping of the langes of the angle bars. This difficulty may lf be overcome by practicing myinvention.

YIn accordance with my invention a vstraight angle bar is bent into a form Suitable for supporting a cross arm. The angle bar'is placed between dies so that one flange isin a horil5 zontal position and the other flange is in a vertical yposition and the dies are then brought.

togetherrto bend the 'anglefbar into-the desired shape. The tendency of the horizontal vflange to buckle or warp during bending of im the angle bar isovercome by holding the horizontal flange between members 4vwhich maintainit substantially flat. V .In the accompanying drawings which i1- lustrate the present preferred embodiment of my invention Figure 1 is va partial plan view of the device showing the Adies spaced apart.

Figure 2 is a side elevation of the device shown in Figure 1. Y p Y Figure` 3 is a view similar to Figure 1 but showing the position of the dies vafter theV angle bar has been bent. Y, Y l Figure 4 isa side elevation'p-of the device shown in Figure 3. Y e Figure 5 is abview in cross-section on the Yline V-V of Figure 3. i

y Figure 6 is an enlarged viewshowing a part of anangle bar support bentin accordance with my'invention.

Figure7 is a sectional view on Ythefline VII- VII of Figure 6 and, f i

Figurev8 is a view of the complete angle bar support. j l" Referring to the drawings, the device comprises a stationary die 2 and a movable die 3. The movable die is arranged to slidev toward and `away from the stationary die within guides Il ofabulldozer. Any usual or desiredform of mechanism for moving the movable die toward and away from the stasired shape.

lwith Va top plate 15.

tionary die may be employed, and as this means forms no part of my invention it is not described in detail. rlhe movable die 3 -is mounted on a base 5 by means ofbolts 6 fand nuts 7.V The die 3 has a top plate 8 so formed as to bend the angle bar to the de- The plate 8 is provided with a substantially cupshaped portion 9, which cooperates with a projecting portion on the top plate of the stationary die in order to form the vertical flange of the angle bar into substantially a cup shape.4 The movable die also has a lower Vplate -10 arranged below the top plate 9 and extending toward the stationary die. The forward edge 11 of the plate 10 is beveled inorder to co-operate when the dies are brought together with a hinge plate connected to the stationary die, in order to clamp the horizontal flange of the angle bar to prevent it from buckling.

The stationary die 2 which is secured to. a base 13, as by means of bolts 14, is provided The top plate hasa plate 16 secured thereto by means of bolts 17 and extends upwardly beyond the plate to form ahousing having an opening 18 in which a retractable slide 20 is arranged. The retractable slide is normally maintained 'in the position.indicated in Figure 1 by means of springs 21 connected to bolts 22 and 23 secured respectively to the plate 16` and the retractable slide 20. The forward `edge 9 of the slide is shaped to cooperate with the cup-shaped portion 9 ofthe movable die in order` to,l form the vertical flange of the angle bar to a substantial cup shape.

p AA hingeplate 25 is connected to the stationary die 2. As showm the right hand end of the hinge plate is mounted in cylindrical recesses 26 provided in the die 2f ThreadedV a 33 formed therein which are adapted to receive one end of pins 34. The opposite ends of the pins are secured in recesses provided in the `die 2. The pins 34 limit the downward movement of the hinge plate 25.

In bending an angle iron to the shape shown in Figures 6, Z and 8, the angle iron A is placed Fig. 1) on the hinge plate 25 and held in position by means of the lugs 35. The movable die 3 is then moved toward the stationary die 2. Before the cup-shaped portion 9 of the movable die reaches the angle iron, the beveled edge 11 of the plate 10 contacts with the rounded forward portion 11 of the hinge plate 25, thereby moving it upward and wedging the horizontal flange of the angle iron between the top surface of the hinge plate and the bottom surface of the top plate 15. As the movable die continues.to move forward the angle iron is gripped between the cup-shaped portion 9 of the movable die and the corresponding projecting portion 9 of the retractable slide 20. The angle iron is bent and the slide moves to the right as shown in the drawings until. when the movable die has moved to its ultimate position, the slide and the dies assume the positions indicated in Figure 8. In this position the springs 21 are stretched out of their normal position. ben-ding operation the horizontal flange of the angle iron is gripped between the slide 2O and the hinge plate 25 from the moment that the cupshaped portion 9 contacts with the angle iron. rlhe middle portion of the angle iron while gripped, slides over the top surface of the hinge plate until the angle iron assumes the position B, indicated in Figure 8 and the cup-shaped portion of the angle iron is formed. The lower, forward edge of the top plate 8 of the movable die is formed with a shoulder 12. If it were formed at a sharp angle it would not stand up in use. During the bending operation the shoulder 12 causes a portion of the metal adjacent the horizontal flange to flow, thereby forming a bead 12. The movable .die is then moved to the left as viewed in Figure 1 and the retractable die under the influence of the springs 21 force the slide 20 forward so as to dispose the bent angle iron in the position indicated by C in Figure 1.

The bent angle iron is then removed from the die and if desired a hole 3G is formed in the horizontal flange for connecting the support to a pole. The ends 37 of the support are then bent, as shown in Figure 8, and holes 38 are punched therein for the reception of screws to connect the cross arm and support.

By the provision of means for gripping the horizontal liange and maintaining it flat daring bending of the angle iron, warping or buckling of the angle iron is prevented. In accordance with my invention an angle iron or other structural shape is bent to the desired form and during the bending a cup- During the shaped portion is formed in one of the flanges of the angle iron so as to provide sufficient room for the reception and tightening of a bolt and nut used to secure the support to the pole.

l have illustrated and described the present preferred embodiment of my invention. It to be understood however, that it may be otherwise embodied without departing from the spirit of the invention or the scope of the following claims.

I claim: l

1. A die mechanism for bending structural shapes, which comprises a plurality7 of dies, means for causing relative movement of said dies toward and away from each other, and means including a hinge plate and a spring-controlled slide for preventing warping of the shapes during bending.

2. A die mechanism for bending angle bars, which comprises a plurality of dies,

means for causing relative movement of said dies toward and away from each other, a hinge plate connected to one of said dies, and a spring-controlled slide associated with said last mentioned die, said hinge plate and slide preventing warping of the angle bar during bending.

3. A die mechanism for bending angle bars, which` comprises a plurality of dies, means for causing relative movement of said dies toward and'away from each other, a hinge plate connected to one of said dies, a slide associated with said last mentioned die, said hinge plate and slide being adapted to grip opposite surfaces of a flange of the angle bar to prevent warping thereof during bending and means urging said slide in a direction to free the bent bar as the dies are drawn apart.

4. A die mechanism for bending angle bars, which comprises a plurality of dies, means for causing relative movement of said dies toward and away from each other, a hinge plate connected to one of said dies, a slide associated with said last mentioned die, means cooperating with said hinge plate as the dies approach each other for causing the hinge plate to wedge a flange of the angle bar between said hinge plate and slide to prevent warping of the flange during bend- A die mechanism for bending angle bars, which comprises a plurality of dies, means for causing relative movement of said dies toward and away from each other, a hinge plate connected to one of said dies, a slide associated with said last mentioned die, means secured to the other die for cooperation with said hinge plate as the dies approach each other for causing the hinge plate to wedge a flange of the angle bar between said hinge plate and said slide to prevent warping of the flange during bending.

6. A die mechanism for bending angle bars, which comprises a stationary die and amovable die, means for moving said movable die toward and away from said stationary die, a hinge plate connected to said stationary die, a retractable slide associated with said stationary die, and resilient means tending to force said slide toward said movable die.

7. A die mechanism for bending angle bars, including two dies, means for causing relative movement of the dies toward and away from each other, a hinge plate connected to the lirst die, a slide mounted on said first die, said slide and hinge plate being arranged to grip opposite surfaces of a flange of the bar to prevent warping, means on the second die for swinging the hinge plate toward the slide to wedge the bar as the dies are brought together, and means urging the slide toward the second die to free the bent bar when the dies are drawn apart.

8. A die mechanism for bending angle bars, including two dies, means for causing relative movement of the dies toward and away from each other, a hinge plate connected to the rst die, a slide mounted on the tlrst die above the hinge plate, means on the second vdie for raising the hinge plate `toward the slide to grip a flange of the bar therebetween as the dies are brought together, and means urging the slide toward the second die to free the bent bar when the dies are drawn apart.

In testimony whereof I have hereunto set my hand.

CHARLES FASSINGER. 

